It is very simple. When a new idea sprouts up, it is very difficult to understand how it will be any different or change the status quo radically.
When Tesla & Nissan came out with their EVs, very few believed this will be any better than ICE. I mean what can be better than filling up gas in 5 minutes compared to waiting on a charger for 4 hours.. right? and you see batteries are expensive too. And also electric cars have been tried and failed in 1910, so this is not a new idea.
It isn't very difficult to understand if you want to. But you do have to open your mind and look at what's _actually_ being done and even what's being said, and consider the implications.
Boring's fundamental aim, which Musk has mentioned _multiple_ times is to make tunneling fast and cheap.
If tunneling is fast and cheap it's economical to have many more tunnels.
If you have tunnels, you can send vehicles through them avoiding other traffic, give you faster point-to-point transportation.
Convergence: electric vehicles and cheap tunnels
If you only have electric vehicles in tunnels you need less ventilation, making them cheaper and fast.
Tesla has an aim of cheap autonomy.
If you have autonomy you don't need a driver.
If you don't need a driver you can have cheap taxis.
Convergence: autonomous vehicles and taxi services
If you have cheap autonomous taxis you have cheap point-to-point transportation.
Convergence: autonomous vehicles, electric vehicles, taxi services and cheap tunnels
Cheap electric autonomous taxis in lots of cheap tunnels for cheap and fast point-to-point transportation.
Don't fall for hype, but hope they make progress and ultimately succeed, because the success will be awesome.
And it's fine to look at the negatives and ask questions as long as you're actually looking for answers. Autonomy, for example, could lead to more congestion and more miles traveled. But it could also result in less congestion and lower road network costs.